Our noses vary in shapes and sizes, from small to large, rounded and long, snout and delicate. But does the function of our noses change with different shapes and sizes, or do they smell, inhale, and explore as they are? And can the sense of smell make a mistake and give us incorrect information, even though it is our means of identifying what is going on around us? Do you think that your noses have mistaken one day, and got you confused?